The joke was on DC in 1975. A ground breaking Series was too short lived, but it had some very interesting issues.
The Joker basked in the limelight for 9 issues. He matched wits from The Scarecrow, and The Creeper to Sherlock Holmes.
I found it entertaining, but at that time villain books didn't last very long.
The series has been collected into a Graphic Novel called "The Joker, Clown Prince of Crime" http://www.dccomics.com/graphic-novels/the-joker-the-clown-prince-of-crime.
For more detailed info about the series, go to the following link: https://en.wikipedia.org/wiki/The_Joker_(comic_book)
The series is a fun read for most DC fans, and more so for Joker Fans.
That is all for now.
To be Continued,
Go forth and do well,